CN107548567A - Synchronous multiple input/multiple output signal in the telecommunication system - Google Patents
Synchronous multiple input/multiple output signal in the telecommunication system Download PDFInfo
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- CN107548567A CN107548567A CN201580079177.8A CN201580079177A CN107548567A CN 107548567 A CN107548567 A CN 107548567A CN 201580079177 A CN201580079177 A CN 201580079177A CN 107548567 A CN107548567 A CN 107548567A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0025—Synchronization between nodes synchronizing potentially movable access points
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
- H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0055—Synchronisation arrangements determining timing error of reception due to propagation delay
- H04W56/0065—Synchronisation arrangements determining timing error of reception due to propagation delay using measurement of signal travel time
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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Abstract
The present disclosure describes for the equipment, system and method for synchronous multiple input/multiple output (" MIMO ") signal or other signals in the telecommunication system.Some aspects can be related to sends signal between the head-end unit of telecommunication system and remote unit.First delay of the signal path between the first remote unit in head-end unit and remote unit can be determined that each delay more than the signal path between head-end unit and other remote units.Based on the first delay, telecommunication system can be configured as postponing the transmission of additional signal so that additional signal is simultaneously sent from head-end unit or simultaneously from remote unit to another unit.
Description
The cross reference of related application
Require herein in submission on May 21st, 2015 and entitled " Synchronizing Multiple-Input/
Multiple-Output Signals in Distributed Antenna Systems " U.S. Provisional Application sequence
No.62/164,986 priority, disclosure of which are incorporated herein by reference.
Technical field
The disclosure relates in general to telecommunications, and more specifically (but being not necessarily exclusively) is related in distributed day
Synchronous multiple input/multiple output signal in linear system system.
Background technology
The example of telecommunication system can include distributing antenna system (" DAS "), repeater or radio access network.Electricity
Letter system can be communicatively coupled to base station (eNodeB for such as (but not limited to) meeting Long Term Evolution (" LTE ") standard).
Telecommunication system can be used for providing wireless communication coverage in various environment, especially in such as office building, meeting
In the large scale structures such as the Room, airport, gymnasium.For example, DAS, which can be included in, is communicatively coupled to one of one or more base stations
Or multiple head-end units (for example, master unit).DAS, which is additionally may included in, is communicatively coupled to the multiple long-range single of head-end unit
Member.Remote unit (each remote unit can include one or more transceivers and antenna) can be distributed in whole overlay area
It is interior.Down link signal from base station can be sent to the movement in the overlay area by remote unit service by remote unit
Phone or other terminal devices.Remote unit may also receive from the uplink signal of terminal device, and by up-link
Signal is sent to head-end unit.
The content of the invention
The disclosure describes to be used for setting for synchronous multiple input/multiple output (" MIMO ") signal or other signals in the telecommunication system
Standby, system and method.
In some respects, there is provided a kind of method.This method can be related to head-end unit and long-range list in telecommunication system
Signal is sent between member.This method can also relate to determine the letter between the first remote unit in head-end unit and remote unit
First delay in number path is more than each delay of the signal path between head-end unit and other remote units.This method may be used also
Be related to based on first delay by telecommunication system be configured to postpone additional signal transmission so that these additional signals simultaneously by
Head-end unit is simultaneously sent from remote unit to another unit.
In other side, there is provided a kind of telecommunication system.The telecommunication system can include remote unit, head-end unit and place
Manage equipment.Remote unit can send down link signal to terminal device and receive uplink signal from terminal device.
Down link signal can be distributed to remote unit and receive uplink signal from remote unit by head-end unit.Processing is set
Standby the first delay that can determine the signal path between head-end unit and remote unit is more than head-end unit and other long-range lists
Each delay in the other signals path between member.It is additional that processing equipment is also based on the first delay instruction telecommunication system delay
The transmission of MIMO signal so that these additional MIMO signals are simultaneously from head-end unit or simultaneously from remote unit to another
Individual unit is sent.
In other side, there is provided a kind of non-transitory computer-readable medium, it has the instruction being stored thereon, instruction
It can be performed by processing equipment to perform operation.The operation can include determining that head-end unit and the first long-range list in telecommunication system
First delay of the signal path between member is more than the other of the other signals path between head-end unit and other remote units
Each delay in delay.The determination can be based on institute in the ethernet frame data sent between head-end unit and remote unit
Including timestamp.The operation can also include telecommunication system is configured into delay expression MIMO signal set based on the first delay
Additional ethernet frame data transmission so that the additional ethernet frame data is simultaneously by head-end unit or simultaneously by remote
Cheng Danyuan is sent to another equipment.
The details of one or more aspects and example is illustrated in the the accompanying drawings and the following description.Further feature and aspect will be from
Become obvious in description, drawings and claims.
Brief description of the drawings
Fig. 1 is shown is communicatively coupled to the distributing antenna system of base station according to being included in for the one side of the disclosure
The block diagram of the example of the telecommunication system of (" DAS ").
Fig. 2 shows the block diagram of the example of the downlink delay in the DAS according to the one side of the disclosure.
Fig. 3 shows the downlink in the DAS for being used to synchronize transmission according to the one side of the disclosure
The block diagram of the example of delay.
Fig. 4 is the example according to the communication unit that synchronizing process can be performed to telecommunication system of the one side of the disclosure
Block diagram.
Fig. 5 is shown to be used for based on maximum downlink delay come to the transmission in DAS according to the one side of the disclosure
The flow chart of the process synchronized.
Fig. 6 shows the flow chart of the process for being used to identify maximum downlink and postponing of the one side according to the disclosure.
Embodiment
Some aspect and feature of the disclosure are related to synchronizing signal in the telecommunication system.In some instances, it is determined that and head
The delay that each signal path between end unit and each remote unit is associated.Telecommunication system can postpone with than with
The transmission of transmitted signal on the path for transmitting less delay of maximum delay, to cause the delay across signal path equal
And the synchronously transmission of the signal from remote unit.
Telecommunication system can be any kind of system for extended wireless covering.The example of telecommunication system includes distribution
Formula antenna system (" DAS "), repeater or radio access network.In some respects, including in the telecommunication system or communicating
On be coupled to the base station of telecommunication system can be with configurating downlink link signal with certain delay.Head-end unit can communicate
On be coupled to base station, from the base station receive down link signal.
Telecommunication system including multiple input/multiple output (" MIMO ") ability can use multiple antennas to terminal device (example
Such as, mobile communication equipment) data are sent, and multiple antennas can be used to receive data from terminal device.MIMO signal set
In each signal can from given antenna element with send from corresponding antenna element in the MIMO signal set its
It sends signal, and simultaneously (or at substantially the same time) sends.Some transmission modes can specify what is sent at different antennae element
The difference of transmission time between signal should be less than regular hour amount (such as 65 nanoseconds).
Difficulty may be brought by simultaneously sending MIMO signal set.For example, head-end unit can receive MIMO letters from base station
Number set.Each signal in MIMO set can be provided to the different remote units of telecommunication system, for transmission to reception
The terminal device of MIMO set.The difference of downlink signal paths between head-end unit and remote unit can cause difference
Downlink delay.For example, it is supplied to the first remote unit to be delayed by and carry for the first MIMO signal of transmission
The second remote unit is supplied for the different amount of the second MIMO signal of transmission.The difference of downlink delay can be by communicating
Different propagation delays causes in medium, and wherein remote unit is being communicatively coupled to head-end unit by communication media.Descending chain
What the difference of road delay can also be performed by the different parts of the different downlink paths from head-end unit to remote unit
Reason is caused by other reasons.
The transmission of signal that can be in synchronous MIMO set according to the telecommunication system of some examples.It can be head-end unit
Each signal path between transmission antenna at input and each remote unit determines delay.It can be identified from these delays
Most long delay, also, through each signal path signal can be delayed by the most long delay and with each signal path phase
Difference between the delay of association.By this way, the delay that the one or more based on some signals identifies, telecommunication system can
To be configured as postponing the transmission of some other signals so that each signal downlink direction, uplink direction or this
Simultaneously from one or more units (for example, part or equipment, such as head-end unit, remote unit or terminal in both direction
Equipment) sent out to one or more of the other unit (for example, part or equipment, such as head-end unit, remote unit or terminal device)
Send.
In some respects, by postponing through these signals of the signal of signal path with prolonging through with most long
The same or analogous delay of signal of slow signal path, can be with simultaneous downlink MIMO signal so that they simultaneously by
Different remote units is sent.For example, downlink mimo signal can be by synchronization, to be set simultaneously to one or more terminals
Preparation is sent.
Fig. 1 depicts the example of telecommunication system 100.The telecommunication system 100 drawn in Fig. 1 includes being existed according to some aspects
It is communicatively coupled to the DAS 104 of base station 102.Although depicting DAS 104 as example in Fig. 1, it can be used
The telecommunication system (such as repeater or radio access network) of its type.Base station 102 can be provided by one or more telecommunications
Business uses.DAS 104 is included in the head-end unit 106 for being communicatively coupled to base station 102.Although depict a head-end unit and
One base station, but any amount of head-end unit and base station can be included.
DAS 104 is additionally included in four remote unit 108a- being spatially separated for being communicatively coupled to head-end unit 106
d.Expanding element 112 can be included, to extend to remote unit 108c and remote unit 108d.Although DAS 104 includes four
Remote unit 108a-d and an expanding element 112, but any amount of remote unit and expanding element can be included.Remotely
Unit 108a-d can be transceiver, and it includes one or more antennas 110 or is being communicatively coupled to one or more days
Line 110.Remote unit 108a-d non-limiting example is generic Access Point (" UAP ").Remote unit 108a-d can be in DAS
One or more areas of coverage in provide signal covering.Remote unit 108a-d different sets can be to be serviced by DAS 104
The area of coverage in different terminal equipment 114 provide service.
(for example, eNodeB of Long Term Evolution " LTE " telecommunication system) can use DAS 104 and terminal device for base station 102
114 are communicated.Head-end unit 106 can receive down link signal from base station 102 and by the descending of analog or digital form
Link signal is distributed to remote unit 108a-d, for the terminal being transferred in the area of coverage serviced by remote unit 108a-d
Equipment 114.
Equipment in DAS 104 can via the digital link using one or more suitable agreements in communication coupling
Close.For example, DAS 104 can include the ethernet link between head-end unit 106 and one or more remote unit 108a-d,
For sending data with ethernet frame.For send this ethernet frame data ethernet link can include wireless connection,
The combination of wired connection or wired connection and wireless connection.
In some respects, each remote unit 108a-d can be communicatively coupled to head via corresponding ethernet link
End unit 106.DAS 104 can be relative in remote unit 108a-d to set using IEEE 1588 (or another agreement)
In the time reference of head-end unit.The timestamp that IEEE 1588 can be provided, the time-stamp Recognition are used for ethernet frame data
Send time, reception time or its certain combination.
Transmission path be present between head-end unit 106 and each remote unit 108a-d.Each transmission path can be to wearing
The signal for crossing the transmission path causes different delays.For example, it may be possible to due between the equipment in each equipment or process circuit
Communication media and exist delay.Combination along multiple delays of transmission path can be referred to as total delay.In some examples
In, can be different along the total delay of the uplink signal and down link signal in identical traffic path.In other examples,
Total downlink delay and total uplink delay can be with identical.
In some respects, appropriate retardation can be added to each delay path, to cause along each transmission road
The total delay in footpath is equal.Make total delay is equal can allow the signal through unlike signal path simultaneously from multiple receiving devices
Send.For example, suitable processing equipment (for example, processing equipment in head-end unit 106) can be from total downlink delay
Most long total downlink delay is identified in set.One in head-end unit 106, expanding element 112, remote unit 108a-d
Or multiple or its certain combination can postpone the down link signal through some downlink paths so that these signals
Simultaneously sent by remote unit.For example, can by using buffer or other suitable memory devices come suspend or with
Other manner postpones one or more data packet transfers by DAS 104, and given downlink path is directed to so as to realize
Programmable delay.To the additional delays of these down link signals can across for send the signal in MIMO set it is multiple under
Uplink path make it that downlink delay is equal.Therefore, the MIMO signal for being sent to multiple remote unit 108a-d can be same
When sent from each remote unit 108a-d to such as one or more terminal devices.
Fig. 2 depicts the downlink in downlink transmission relative to Fig. 1 head-end unit 106 and remote unit 108a
The example of delay.Processing equipment 206 in head-end unit 106 can set the clock 208 in head-end unit 106.Clock 208 can
To be real-time clock so that it is to be based on the time, rather than the counter of the clock speed based on processor.It can use for example
Set using the external master clock source of IEEE 1588, gps receiver, the time reference that is received from the base station 102 that is connected etc.
Clock 208.Processing equipment 216 in remote unit 108a can set the clock 218 in remote unit 108a.Clock 218
It can be real-time clock, and can be set in a manner of with the identical of clock 208.Clock 218 can also be set relative to clock 318
Put.For example, processing equipment 216 can set the clock 218 at remote unit 108a using IEEE 1588.Use IEEE
1588 can allow multiple networked devices that associated clock is synchronized into " great master (grandmaster) " time reference.
When physical layer equipment 204 in head-end unit 106 can be configured so that clock 208 is used as by processing equipment 206
Between benchmark transmit signal.Physical layer equipment 214 in remote unit 108a can be configured so that clock by processing equipment 216
318 transmit signal as time reference.The example of physical layer equipment is ethernet transceiver.Signal, which can be transmitted through, to be drawn
Enter the communication media 210 of propagation delay.
In order to determine propagation delay, head-end unit 106 can send message to remote unit 108a.The message can indicate
Remote unit 108a sends response message in time t1.Head-end unit 106 can record the time t2 that the message is received.It is descending
Link propagation delay d1 (it can be equal to uplink propagation delay d2) can be that remote unit 108a sends response message
Time t1 and head-end unit 106 receive the difference between the time t2 of response message.
Downlink delay can also include handling caused by the signal processing circuit 202,212 in downlink path
Delay.Processing delay in head-end unit 106 can occur in signal processing circuit 202, or in remote unit 108a
Occur in signal processing circuit 212.It is remote to include downlink with the example of 202,212 associated delay of signal processing circuit
Journey processing delay d1r (associated with signal processing circuit 212), downlink head end processing delay d1h are (with signal processing circuit
202 is associated), at up-link remote processing delay d2r (associated with signal processing circuit 212) and up-link head end
Reason delay d2h (associated with signal processing circuit 202).
By the understanding to the circuit for process signal, it is known that or in estimation delay d1r, d1h, d2r and d2h
It is one or more.For example, processing equipment can identify with perform in the signal path one or more operation is associated prolongs
Late.These operations can include the RF signals received from base station 102 for example are down-converted into intermediate frequency, the signal received is carried out
Digitize, the signal received is filtered, etc..Handling delay can be tested, by by being included in by pre-installing
The test performed in the DAS 104 of installation or in the one or more processing equipments for being communicatively coupled to installed DAS 104
Process or its certain combination identify.Information on processing delay can be stored in computer-readable medium, and MIMO is synchronous
During the processing equipment that is related to may have access to the computer-readable medium.Delay information can be processed equipment for determining to be used for
Total downlink delay of given downlink path.
Head-end unit 106 can be calculated from the transmission day being input at each remote unit 108a-d of head-end unit 106
Total downlink delay of the down link signal (for example, MIMO signal) of line 110.For example, remote unit 108a's is total descending
Link delay can be propagation delay d1, downlink remote processing delay d1r and downlink head end processing delay d1h it
With.Most long total downlink delay in set from total downlink delay can be used to postpone in same MIMO set
Signal transmission so that the MIMO set in all signals simultaneously sent.
Fig. 3 depicts the more detailed block diagram of some equipment in the telecommunication system 100 from Fig. 1 and Fig. 2.It is specific and
Speech, Fig. 3 are depicted in pair being communicatively coupled between two remote unit 108a-b head-end unit 106 and these units
Answer transmission path.
Remote unit 108b includes processing equipment 316 and clock 318, and clock 318 can be real-time clock.Processing equipment
Physical layer equipment 304 in head-end unit 106 can be configured so that clock 208 passes signal as time reference by 206
It is sent to remote unit 108b.Physical layer equipment 314 in remote unit 108b can be configured so that clock by processing equipment 316
318 transmit signal as time reference.These signals can transmit the communication media 310 by introducing propagation delay.
The downlink delay of downlink path between the input of head-end unit 106 and transmission antenna 110a
(" drau1 ") can be calculated as drau1=d1r+d1h+d1.It is descending between the input of head-end unit 106 and antenna 110b
The downlink delay (" drau3 ") of link paths can be calculated as drau3=d3r+d3h+d3.If drau1 is more than
Drau3, then can be configured to drau1- for the programmable downlink delay to remote unit 108b path
drau3.If drau1 is less than drau4, then can be configured to for the programmable delay to remote unit 108a path
drau3-drau1.Complementary process can be performed in the uplink direction.
Fig. 4 is the block diagram for the example for drawing the communication unit 400 that synchronizing process can be performed to telecommunication system.Show at some
In example, communication unit 400 can be included in one in head-end unit, expanding element, remote unit, DAS controllers etc. or
In multiple.Communication unit 400 can include processing equipment 402 and memory 404.Processing equipment 402 can couple in communication
To memory 404.Processing equipment 402 can include being configurable for the program code that execution is stored in memory 404
Any amount of processor.The example of processing equipment 402 can be compiled including microprocessor, application specific integrated circuit (" ASIC "), scene
Journey gate array (" FPGA ") or other suitable processors.Memory 404 can include such as non-transitory computer-readable medium.
The program code being stored in memory 404 can include the synchronization engine 406 that can be performed by processing equipment 402.
Synchronization engine 406 can include one or more algorithms for synchronous MIMO transmission.
Fig. 5 depicts the process 500 for simultaneous downlink signal in the telecommunication system.Fig. 5 process is to refer to head
Transmission path between end unit and remote unit describes, but other implementations are possible.In addition, Fig. 5 is depicted
The process 500 related to the down link signal along downlink path, but the process may apply to along up-link
The uplink signal in path.
In square frame 502, head-end unit sends down link signal to remote unit.Although square frame 502 is described to remote
Cheng Danyuan send down link signal single head-end unit, but some examples can include any amount of head-end unit,
Remote unit and expanding element are on uplink direction or downlink direction to any amount of other head-end units, long-range
Unit and expanding element send signal.In some respects, down link signal can include representing to come from base in ethernet frames
Stand or the data of the signal in other signals source.In some respects, down link signal can be MIMO signal.Down link signal
It can be sent through any suitable communication media (for example, copper cash, optical fiber, Radio Link etc.).
In square frame 504, head-end unit determines the maximum downlink delay among remote unit.In some instances,
It can determine that maximum downlink postpones by comparing the delay on down link signal between unlike signal path.At it
In its example, maximum downlink can be estimated by comparing the delay on uplink signal between unlike signal path
Delay.In some respects, maximum downlink delay can include coming from propagation delay and head-end unit and remote unit
Any one of or both in process circuit delay.This can be referred to as maximum total downlink delay.Describe in figure 6
For the example for the process for determining maximum downlink delay.
Fig. 6 depicts the process 600 for determining the downlink path with maximum downlink delay.In order to illustrate
Purpose, process 600 described with reference to the communication unit 400 of figure 4, wherein communication unit 400 can be located at head-end unit, long-range
In any combination of suitable equipment in unit or telecommunication system.But other implementations are possible.Although in addition, Fig. 6
The process 600 related to the down link signal along downlink path is depicted, but process 600 can also be applied to edge
The uplink signal of uplink path.
In square frame 602, processing equipment 402 is arranged on the real-time clock in head-end unit and remote unit.It can use
The agreements of IEEE 1588, gps receiver, the time reference received from the base station that is connected or for synchronous between networked devices
Another equipment of clock sets real-time clock.In alternative exemplary, real-time clock can be replaced with counter.
In square frame 604, processing equipment 402 indicates that remote unit head-end unit at time t1 sends message.One
A little aspects, processing equipment can be included in a remote unit or be communicatively coupled to remote unit, and can control
The transmission of message head-end unit.In other side, processing equipment 402 can be included in head-end unit or any other unit
In or be communicatively coupled to head-end unit or any other unit, and signal, the signal can be sent to remote unit
With the instruction for sending message.In some respects, the instruction provided by processing equipment 402 can not include the time for sending message
t1.Instruction can ask remote unit that message and transmission time are sent into processing equipment 402.
In block 606, processing equipment 402 identifies the time t2 that message is received by head-end unit.In some respects, handle
Equipment 402 can be by being included in head-end unit and message directly being received from remote unit come recognition time t2.Other
Aspect, processing equipment can be communicated with head-end unit and indicate that head-end unit report head-end unit receives the time of message
t2.In other side, it can indicate that head-end unit sends signal at time t1 to remote unit from processing equipment 402.Time
T2 can be identified as the time that remote unit receives the signal.
In block 608, processing equipment 402 by take the difference between t1 and t2 determine head-end unit and remote unit it
Between signal path delay.Processing equipment 402 can also by by between t1 and t2 difference and with head-end unit, remote unit
Or both in the associated known delay of process circuit be combined to determine delay.
In square frame 610, processing equipment 402 determines whether to have identified delay for all remote units.If no
It is, then to not yet identifying that each remote unit of delay repeats square frame 604,606 and 608 to it.If it has been all
Remote unit have identified delay, then processing equipment 402 proceeds to square frame 612.
In square frame 612, processing equipment 402 is by comparing the descending chain of the signal path associated with each remote unit
Road postpones to identify the maximum downlink delay among remote unit.It can be postponed using maximum downlink so that pass through
The signal of some or all of signal paths in other signals path is delayed by so as to equal to maximum downlink delay
Delay.In some respects, total downlink delay can be included in the propagation delay that is determined in square frame 604 and from head end list
The delay of the process circuit of either or both among member and remote unit.In other side, it can use and come from square frame 604
Propagation delay determine total downlink delay, and without using the process circuit in head-end unit and remote unit among
The delay of either or both.
In some respects, may postpone without using the maximum downlink of the set from downlink delay.For example, the
The downlink delay of one downlink path can differ by more than with other downlink delays of other downlink paths
The amount of threshold value.The performance of telecommunication system can be negatively affected by carrying out synchronous MIMO transmission using this excessive downlink delay.
If maximum downlink postpones to differ by more than the amount of threshold value with other downlink delays, then is related in synchronizing process 400
Processing equipment 402 can select another downlink delay value less than threshold value for synchronous MIMO transmission.Processing is set
Standby 402 can indicate to have the downlink path of excessive downlink delay should not be used for MIMO transmission.
Fig. 5 is returned to, in square frame 506, telecommunication system is postponed based on maximum downlink to postpone additional downlink
Signal so that down link signal is simultaneously sent by remote unit.In some instances, programmable delay is applied to additional
Down link signal so that the delay between downlink path is identical.Programmable delay can be in downlink path
One or more of realize in equipment.In some respects, head-end unit can buffer or otherwise postpone MIMO set
One or more of signal transmission.In adjunctively or alternatively aspect, head-end unit can be to its in downlink path
Its equipment (for example, expanding element, remote unit etc.) sends instruction, to postpone the biography of one or more of MIMO set signal
It is defeated.For example, head-end unit can send given MIMO signal to remote unit, the signal has measures delay hair with specified time
Send the instruction of MIMO signal.
In some instances, signal is whole simultaneously to one or more of overlay area of remote unit by remote unit
End equipment is sent., should although Fig. 5 depicts the process 500 related to the down link signal along downlink path
Process may apply to the uplink signal along uplink path.For example, the process may apply to up-link letter
Number so that additional uplink signal is sent by head-end unit simultaneously to one or more base stations.
In some respects, synchronizing process 500 can be performed in response to the change in telecommunication system.For example, from Fig. 4's
Processing equipment 402 can be related in synchronizing process, and can receive following data, the data instruction remote unit from
It is removed in telecommunication system, remote unit is added to telecommunication system or remote unit is moved into covering for telecommunication system
Diverse geographic location in cover area.These changes can influence the downlink delay for synchronization.Processing equipment 402 can be with
Configured by using new telecommunication system to perform synchronizing process 500, so as to be responded to the change in telecommunication system.
Although this theme is described in detail in the specific aspect and feature on this theme, it will be recognized that
Those skilled in the art can easily produce the change of these aspect and feature after foregoing teachings are understood, deform and be equal
Thing.In disclosed aspect, example and feature each can with one in other disclosed aspects, example and feature or
Multiple combinations.It is, therefore, to be understood that the disclosure is in order to which example rather than the purpose of limitation provide, and it is not excluded for
This modification, deformation or the addition to this theme that will be readily apparent including such as those of ordinary skill in the art.
Claims (20)
1. a kind of method, including：
Signal is sent between the head-end unit of telecommunication system and remote unit；
Determine that the first delay of the signal path between the first remote unit in the head-end unit and the remote unit is big
Each delay of signal path between the head-end unit and other remote units；And
Based on the first delay, the telecommunication system is configured to postpone to the transmission of additional signal so that the additional signal is simultaneously
Ground is sent from the head-end unit or simultaneously from the remote unit to another unit.
2. the method as described in claim 1, wherein the telecommunication system is distributing antenna system, and the signal includes
Represent the ethernet frame data of the set of multiple input/multiple output signal.
3. method as claimed in claim 2, wherein determine the first delay more than the head-end unit and other remote units it
Between the delay of signal path include：
It is provided for the real-time clock of the head-end unit and the remote unit；
For each remote unit in the remote unit：
Message is sent between the head-end unit and the remote unit, the message is included in very first time transmission response message
Instruction,
Identification is received the second time of the response message by the head-end unit or the remote unit, and
Determine to postpone according to the difference between the very first time and the second time；And
Identify the maximum delay among the remote unit.
4. method as claimed in claim 3, wherein the real-time clock is set using IEEE1588 agreements, with synchronization
Ethernet communication between the head-end unit and the remote unit.
5. method as claimed in claim 3, wherein determining the delay of each remote unit is also included each remote unit
Delay and the first processing delay and the process circuit by the remote unit as caused by the process circuit system of the head-end unit
Second processing delay is combined caused by system.
6. the method as described in claim 1, wherein the telecommunication system to be configured to postpone to the transmission bag of the additional signal
Include using buffer to postpone the additional signal.
7. the method as described in claim 1, wherein the additional signal is additional uplink signal, and the affix
Downlink signal is sent by the head-end unit simultaneously to base station.
8. the method as described in claim 1, wherein the telecommunication system to be configured to postpone to the biography of additional downlink signals
It is defeated also to include：
Determine that the first delay is more than threshold value；And
Another downlink delay of selection less than the threshold value.
9. a kind of telecommunication system, including：
Multiple remote units, it is configured as sending down link signal to terminal device and is received from the terminal device up
Link signal；
Head-end unit, it is configured as the down link signal being distributed to the multiple remote unit and from the multiple remote
Cheng Danyuan receives the uplink signal；With
Processing equipment, it is configured as：
Determine that first of the signal path between the first remote unit in the head-end unit and the multiple remote unit prolongs
The each delay being more than late in other delays in the other signals path between the head-end unit and other remote units；And
Based on the first delay, the transmission of the additional multiple input/multiple output signal of the telecommunication system delay is indicated so that described attached
The multiple input/multiple output signal added is simultaneously sent out from the head-end unit or simultaneously from remote unit to another unit
Send.
10. telecommunication system as claimed in claim 9, wherein the processing equipment is additionally configured to：
Real-time clock in the head-end unit is set；And
The physical layer equipment of the head-end unit is realized, to transmit signal using the real-time clock as time reference.
11. telecommunication system as claimed in claim 10, wherein the processing equipment is additionally configured to：
For each remote unit：
Message is sent between the head-end unit and remote unit, the message is included in very first time transmission response message
Instruction；
Identification is received the second time of the response message by the head-end unit or remote unit；
Determine to postpone according to the difference between the very first time and the second time；And
Identify the maximum delay among the remote unit.
12. telecommunication system as claimed in claim 11, wherein the real-time clock, which can use, is used for the synchronous head end list
The IEEE1588 agreements of ethernet communication between first and described remote unit are configured.
13. telecommunication system as claimed in claim 11, wherein the processing equipment is additionally configured to be based on by the head end list
The first processing postpones and second caused by the process circuit system of the remote unit caused by the process circuit system of member
Reason delay postpones to determine to handle.
14. telecommunication system as claimed in claim 9, wherein the processing equipment is configured as indicating that the telecommunication system uses
Buffer postpones the transmission of additional multiple input/multiple output signal.
15. telecommunication system as claimed in claim 9, wherein the additional multiple input/multiple output signal is by described long-range single
Member is sent simultaneously to terminal device.
16. telecommunication system as claimed in claim 9, wherein the process circuit is additionally configured to：
Determine that the first delay is more than threshold value；
Another length of delay of selection less than the threshold value；And
The length of delay based on less than the threshold value, the telecommunication system is configured to postpone to the transmission of additional signal so that
The additional signal is simultaneously sent from the head-end unit or simultaneously from the remote unit to another unit.
17. a kind of non-transitory computer-readable medium, the non-transitory computer-readable medium has the instruction being stored thereon,
The instruction can be performed by processing equipment to perform operation, and the operation includes：
Based on the ethernet frame data sent between head-end unit in the telecommunication system and multiple remote units include when
Between stab, it is determined that first of the signal path between the first remote unit in the head-end unit and the multiple far-end unit
Delay is more than each delay in other delays in the other signals path between the head-end unit and other remote units；With
And
Based on the first delay, by the telecommunication system be configured to delay represent multiple input/multiple output signal set it is additional with
The too transmission of net frame data so that the additional ethernet frame data simultaneously passes through by the head-end unit or simultaneously
Remote unit is sent to another equipment.
18. non-transitory computer-readable medium as claimed in claim 17, wherein the operation also includes：
It is provided for the real-time clock of the head-end unit and the remote unit；
For each remote unit：
Instruction sends message between the head-end unit and the remote unit, and the message includes sending the finger of response message
Order,
Identification sends the very first time of the response message by a unit and receives the response message by another unit
Second time；And
Determine to postpone according to the difference between the very first time and the second time；And
Identify the maximum delay among the remote unit.
19. computer-readable medium as claimed in claim 18, the real-time clock is provided with including the use of for synchronization
The agreements of IEEE 1588 of ethernet communication between the head-end unit and the remote unit.
20. computer-readable medium as claimed in claim 18, wherein the operation is also included by by each remote unit
Delay with caused by the process circuit system of the head-end unit first processing delay and by the remote unit
Second processing delay is combined to determine the total delay of each remote unit caused by reason circuit system.
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| US201562164986P | 2015-05-21 | 2015-05-21 | |
| US62/164,986 | 2015-05-21 | ||
| PCT/IB2015/059644 WO2016185261A1 (en) | 2015-05-21 | 2015-12-15 | Synchronizing multiple-input/multiple-output signals in telecommunications systems |
Publications (2)
| Publication Number | Publication Date |
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| CN107548567A true CN107548567A (en) | 2018-01-05 |
| CN107548567B CN107548567B (en) | 2020-10-27 |
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| US (2) | US11071079B2 (en) |
| EP (2) | EP4017212A1 (en) |
| CN (1) | CN107548567B (en) |
| WO (1) | WO2016185261A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107548567B (en) | 2020-10-27 |
| EP4017212A1 (en) | 2022-06-22 |
| WO2016185261A1 (en) | 2016-11-24 |
| US11825433B2 (en) | 2023-11-21 |
| EP3298834B1 (en) | 2022-03-09 |
| EP3298834A1 (en) | 2018-03-28 |
| US20180124729A1 (en) | 2018-05-03 |
| US11071079B2 (en) | 2021-07-20 |
| US20210314893A1 (en) | 2021-10-07 |
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